Green Roof Costs And Benefits

The cost benefit analysis presented in this section is based on a direct comparison between installing either a black roof or a state of the art extensive green roof as a replacement for an existing conventional roof.

Green roof costs and benefits.

Maintenance costs for domestic green roofs tend to involve the replacing of plants and doing the gardening work which you can pay someone to do or undertake yourself if you are a keen horticulturist. Green roofs provide major benefits are relatively straightforward to install and can be added to existing buildings as well as new construction projects. The costs and benefits of the extensive green roof are averaged between a 3 inch multi course extensive. 10 west jackson street chicago il.

A green roof also known as a rooftop garden or a living roof is a vegetative layer grown on a rooftop. The popularity of green roofs has increased in the united states due to their many benefits while pretty green roofs serve a much greater purpose than simple beautification. Over its estimated lifespan of 40 years a green roof would save about 200 000 of which nearly two thirds would come from reduced energy costs. The study looked at a range of benefits of green roofs including stormwater management improved health benefits due to reduced pollution and energy savings.

This page provides a brief overview of the role of green roofs in mitigating the heat island effect including green roof types other environmental and social benefits and cost benefit considerations. Depending on a variety of factors the costs for installing a green roof can be quite high. Green roof cost benefit analysis pdf 885 kb. However the life cycle cost is competitive.

A green roof provides a rainwater buffer purifies the air reduces the ambient temperature regulates the indoor temperature saves energy and encourages biodiversity in the city. A green roof has many benefits at economic ecological and societal levels. If you add on that you are extending the lifespan of your roof by installing a green roof then the benefits begin to add up. Green roof capital costs.

Green roofs provide extra space. Try out green roofs for healthy cities green save calculator. Examples of important factors that influence green roof capital costs include. Gsa s green roof report estimated that green roofs on commercial and public buildings provide a payback based on 50 year average annual savings of about 6 2 years nationally internal rate of return of 5 2 and an roi of 224 based on a net present value.

The initial installation cost of a green roof is more than a traditional roof. All other factors being equal location ease of access etc per square foot cost would typically decrease by a factor of at least 3 as size increases from a 1 000 square foot roof to a 20 000 square foot roof. Green roofs are part of climate proof construction. Green roofs have been proven to help reduce heat islands.

Unlike traditional black tar roofs green roofs reduce energy costs by absorbing heat instead of attracting it and. A green roof or rooftop garden is a vegetative layer grown on a rooftop. Green roofs make the most of unused space within the increasing density of our cities.